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McAlvay AC, Armstrong CG, Baker J, Elk LB, Bosco S, Hanazaki N, Joseph L, Martínez-Cruz TE, Nesbitt M, Palmer MA, Priprá de Almeida WC, Anderson J, Asfaw Z, Borokini IT, Cano-Contreras EJ, Hoyte S, Hudson M, Ladio AH, Odonne G, Peter S, Rashford J, Wall J, Wolverton S, Vandebroek I. Ethnobiology Phase VI: Decolonizing Institutions, Projects, and Scholarship. J ETHNOBIOL 2021. [DOI: 10.2993/0278-0771-41.2.170] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Alex C. McAlvay
- Institute of Economic Botany, The New York Botanical Garden, 2900 Southern Blvd, Bronx, NY 10458
| | | | - Janelle Baker
- Anthropology, Athabasca University, Athabasca, Alberta, Canada
| | | | - Samantha Bosco
- 5 Horticulture Section, School of Integrated Plant Sciences, Cornell University, Ithaca, New York
| | - Natalia Hanazaki
- Departamento de Ecologia e Zoologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Leigh Joseph
- 7 School of Environmental Studies, University of Victoria, BC, Canada
| | | | - Mark Nesbitt
- Royal Botanic Gardens, Kew, Richmond, Surrey, UK
| | - Meredith Alberta Palmer
- Science and Technology Studies Department, American Indian and Indigenous Studies Program, Cornell University, Ithaca, New York
| | | | - Jane Anderson
- Equity for Indigenous Research and Innovation Coordinating Hub, Anthropology and Museum Studies, New York University, New York, New York
| | - Zemede Asfaw
- Department of Plant Biology and Biodiversity Management, Addis Ababa University, Addis Ababa, Ethiopia
| | - Israel T. Borokini
- Ecology, Evolution and Conservation Biology Graduate Program, Department of Biology, University of Nevada, Reno, Nevada
| | - Eréndira Juanita Cano-Contreras
- Centro de Investigaciones Multidisciplinarias sobre Chiapas y la Frontera Sur, Universidad Nacional Autónoma de México, Chiapas, México
| | - Simon Hoyte
- Department of Anthropology, University College London, London, United Kingdom
| | - Maui Hudson
- Te Kotahi Research Institute, University of Waikato, Hamilton, New Zealand
| | - Ana H. Ladio
- INIBIOMA (CONICET-Universidad Nacional del Comahue), San Carlos de Bariloche, Río Negro, Argentina
| | | | - Sonia Peter
- 20 Biocultural Education and Research Programme, St. James, Barbados
| | - John Rashford
- Department of Sociology and Anthropology, College of Charleston, Charleston, South Carolina
| | - Jeffrey Wall
- Department of Geography, Environment and Geomatics, University of Guelph, Ontario, Canada
| | - Steve Wolverton
- Department of Geography and the Environment, University of North Texas, Denton, Texas
| | - Ina Vandebroek
- Institute of Economic Botany, The New York Botanical Garden, 2900 Southern Blvd, Bronx, NY 10458
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Rashford J. Jamaican Food: History, Biology, Culture. EBL 2010. [DOI: 10.14237/ebl.1.2010.76] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Review of Jamaican Food: History, Biology, Culture. B. W. Higman. 2008. University of West Indies Press, Jamaica. Pp. 580. $70.00 (cloth). ISBN (cloth) 9789766402051.
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Protchenko O, Ferea T, Rashford J, Tiedeman J, Brown PO, Botstein D, Philpott CC. Three cell wall mannoproteins facilitate the uptake of iron in Saccharomyces cerevisiae. J Biol Chem 2001; 276:49244-50. [PMID: 11673473 DOI: 10.1074/jbc.m109220200] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Analysis of iron-regulated gene expression in Saccharomyces cerevisiae using cDNA microarrays has identified three putative cell wall proteins that are directly regulated by Aft1p, the major iron-dependent transcription factor in yeast. FIT1, FIT2, and FIT3 (for facilitator of iron transport) were more highly expressed in strains grown in low concentrations of iron and in strains in which AFT1-1(up), a constitutively active allele of AFT1, was expressed. Northern blot analysis confirmed that FIT1, FIT2, and FIT3 mRNA transcript levels were increased 60-230-fold in response to iron deprivation in an Aft1p-dependent manner. Fit1p was localized exclusively to the cell wall by indirect immunofluorescence. Deletion of the FIT genes, individually or in combination, resulted in diminished uptake of iron bound to the siderophores ferrioxamine B and ferrichrome, without diminishing the uptake of ferric iron salts, or the siderophores triacetylfusarinine C and enterobactin. FIT-deletion strains exhibited increased expression of Aft1p target genes as measured by a FET3-lacZ reporter gene or by Arn1p Western blotting, indicating that cells respond to the absence of FIT genes by up-regulating systems of iron uptake. Aft1p activation in FIT-deleted strains occurred when either ferrichrome or ferric salts were used as sources of iron during growth, suggesting that the FIT genes enhance uptake of iron from both sources. Enzymatic digestion of the cell wall resulted in the release of significant amounts of iron from cells, and the relative quantity of iron released was reduced in FIT-deletion strains. Fit1p, Fit2p, and Fit3p may function by increasing the amount of iron associated with the cell wall and periplasmic space.
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Affiliation(s)
- O Protchenko
- Liver Diseases Section, NIDDK, National Institutes of Health, Bethesda, Maryland 20892-1800, USA
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Yun CW, Ferea T, Rashford J, Ardon O, Brown PO, Botstein D, Kaplan J, Philpott CC. Desferrioxamine-mediated iron uptake in Saccharomyces cerevisiae. Evidence for two pathways of iron uptake. J Biol Chem 2000; 275:10709-15. [PMID: 10744769 DOI: 10.1074/jbc.275.14.10709] [Citation(s) in RCA: 158] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In the yeast Saccharomyces cerevisiae, uptake of iron is largely regulated by the transcription factor Aft1. cDNA microarrays were used to identify new iron and AFT1-regulated genes. Four homologous genes regulated as part of the AFT1-regulon (ARN1-4) were predicted to encode members of a subfamily of the major facilitator superfamily of transporters. These genes were predicted to encode proteins with 14 membrane spanning domains and were from 26 to 53% identical at the amino acid level. ARN3 is identical to SIT1, which is reported to encode a ferrioxamine B permease. Deletion of ARN3 did not prevent yeast from using ferrioxamine B as an iron source; however, deletion of ARN3 and FET3, a component of the high affinity ferrous iron transport system, did prevent uptake of ferrioxamine-bound iron and growth on ferrioxamine as an iron source. The siderophore-mediated transport system and the high affinity ferrous iron transport system were localized to separate cellular compartments. Epitope-tagged Arn3p was expressed in intracellular vesicles that co-sediment with the endosomal protein Pep12. In contrast, Fet3p was expressed on the plasma membrane and was digested by extracellular proteases. These data indicate that S. cerevisiae has two pathways for ferrrioxamine-mediated iron uptake, one occurring at the plasma membrane and the other occurring in an intracellular compartment.
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Affiliation(s)
- C W Yun
- Liver Diseases Section, NIDDK, National Institutes of Health, Bethesda, Maryland 20892-1800, USA
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Philpott CC, Rashford J, Yamaguchi-Iwai Y, Rouault TA, Dancis A, Klausner RD. Cell-cycle arrest and inhibition of G1 cyclin translation by iron in AFT1-1(up) yeast. EMBO J 1998; 17:5026-36. [PMID: 9724638 PMCID: PMC1170830 DOI: 10.1093/emboj/17.17.5026] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Although iron is an essential nutrient, it is also a potent cellular toxin, and the acquisition of iron is a highly regulated process in eukaryotes. In yeast, iron uptake is homeostatically regulated by the transcription factor encoded by AFT1. Expression of AFT1-1(up), a dominant mutant allele, results in inappropriately high rates of iron uptake, and AFT1-1(up) mutants grow slowly in the presence of high concentrations of iron. We present evidence that when Aft1-1(up) mutants are exposed to iron, they arrest the cell division cycle at the G1 regulatory point Start. This arrest is dependent on high-affinity iron uptake and does not require the activation of the DNA damage checkpoint governed by RAD9. The iron-induced arrest is bypassed by overexpression of a mutant G1 cyclin, cln3-2, and expression of the G1-specific cyclins Cln1 and Cln2 is reduced when yeast are exposed to increasing amounts of iron, which may account for the arrest. This reduction is not due to changes in transcription of CLN1 or CLN2, nor is it due to accelerated degradation of the protein. Instead, this reduction occurs at the level of Cln2 translation, a recently recognized locus of cell-cycle control in yeast.
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Affiliation(s)
- C C Philpott
- Cell Biology and Metabolism Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892-5430, USA.
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